Roller ore-crusher



(No Model.) 3 Sheets-Sheet 1.

S.R.KROM.

. ROLLER ORE ORUSHER. No. 339,664. Patented Apr. 13,1886.

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(No Model.) 3 Sheets- Sheet 2.

S. R. KROM. A

ROLLER ORE GRUSHER. No. 339,664. Patented Apr. 13, 1886 lilllHllllHlJlWNW" I: I

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(UNITED STATES A PATENT OFFICE.

STEPHEA R. KROM, OF PLAINFIELD, NE? JERSEY.

ROLLER ORE-CRUSHER.

SPECIFICATION forming part of Letters'Patent No. 339.664. dated April 13, 1886.

Application filed August 4, 1884. Serial No. 139,564. (No model.) 7

To all whom it may concern:

Be it known that I, STEPHEN R. KROM, of Plainfield, in the county of Union and State of New Jersey, have invented an Improvement in Roller Ore-Crushers, of which the following is a specification.

In Letters Patent No. 129,238, heretofore granted to me, there are two steelfaced rollers and frames and driving mechanism having some resemblance to the crusher herein shown.

My present invention relates to the features of improvement hereinafter more fully de' scribed, and pointed out in the claims.

In the drawings, Figure 1 is an elevation of the crusher. Fig. 2 is an end view with the roller and housing in section. Fig. 3 is a side view of the roller-housing. Fig. 4. is a cross section of the same as applied to the roller. Fig. 5 shows the'end plate of the hopper by a vertical section. Fig. 6 is ahorizont-al section of the same. Fig. 7 shows the tie-bolt separately, and Fig. 8 is an end view of theroller separate from the shaft.

The shaft A is provided with a large am;

ing-wheel, B, at one end, and the crushingroller 0 between the sides of the metallic housing S, and the shaft E is provided with a small pulley, F, at one end, and with the crushingroller G between the sides of the housing. I prefer and use the large wheel B and a belt to the same for driving the crusher, and the small pulleyor wheel F, with a belt to keep up the motion of the other roller. If brittle quartz is being crushed, it is sometimes only necessary to drive one roller. I prefer to use the pulley F and the belt for driving the roller G.

In my English Patent No. 1,058 of 18741 showed crushing rollers each made with a steel or hard-metal ring or tire with the inner faces slightly conical, and with split-ring followers or hubs keyed upon the shaft and drawn toward each other by bolts. I have discovered that the keys can be dispensed with, so as to save the expense of the key and its seat, and render the rollers more convenient if changes or repairs are needed. The steel tire f is cylindrical upon its exterior surface, and the inner surface is a double cone or taper, the middle being thickest. Thefollowers h are inade as split rings, the interior being cylindrical to fit over the shaft, and the exterior slightly tapering to fit the interior of the steel tire. At 4 is the opening or split. The spokes 5 unite said interior and exterior split rings of each follower, the parts being all cast together. The bolts k pass through holes in the spokes. When the parts are placed together and properly located upon the shaft, the bolts are screwed up and the followers wedging into the tapers of the interior of the steel tires are bound also firmly upon the shaft and the same is grasped, so that any other fastening is unnecessary. The parts can be separated, when necessary,for repairs or for introducing new tires.

In my patent before mentioned, No. 129,238, there are two tie-bolts through each frame. I find the same disadvantageous, both in increasing the expense and in interferingwith the adjustment, the machine being more convenient when made as herein described. Upon the bed H,I place the pillow-blocks M for the shaft A. Each pillow-block is made withjournal-boxes Z, the caps Z of which are at an angle of about fortyfive degrees. so that the strain in crushing does not come upon the caps, and

from the boxes I the radial braces 6 78 pass to the base 9 and abutment 10, and there is a cylinder, 11, for the tie-bolt P to pass through. These pillow-blocks M are bolted fast to the bed-plate H. The boxes, braces, cyli nder, base, and abutment are all cast in one piece for each pillow-block. The pillow blocks Q for the shaft E are made similar to the blocks M, butr they are free to slide upon the frame, the bolts 14 having heads below slots in the bed-plate. The bolts P have each a collar, 15, near the middle, and nuts 16 ;and 17 at the ends. Around each bolt there are springs, as at R, resting against the abutment 10 and the follower orwasher B. By the nuts 17 these springs can b'ecompressed more or less and their forceincreased or lessened, as required; but in so doing the opening between the rollers' is not varied, because the collar 15 abuts against the end of the cylinder 11,and this collar cannot get loose or move, as the nuts heretofore used on these bolts; hence the adjustment can be effected more rapidly and reliably than heretofore. The nuts 16 are at the outer ends of necessary, without the renewal of any other the cylinders 11 upon the pillow-blocks Q,and when the rollers separate to pass any foreign substance the tie-rods draw along in the cylinders of the pillow-blocks M and compress the springs R. The screws r,passing through blocks 1", bolted to the frame,are employed to limit the movement of the rollers toward each other by stopping the sliding pillow-blocks Q. These prevent the belt upon the pulley F from drawing the rollers too close together, as said belt is preferably taken off in the direction indicated in Fig. 1. There is a metallic housing for the rollers, the same being formed of the flanged side plates, S, and end plates, S, bolted together and to the bed-plate H, and in the middle the plates S are extended upwardly to receive and support upon their inner surfaces the cheek-plates T. (See Figs.5 and 6.) Each of these cheek-plates T is dovetailed at its edges and received into the stock T, that is bolted at t to the plate S, there being fillingpiecesu,preferably of wood, between S and T. The bottom edge of T rests upon a flange, S

upon the inner surface of the plate S, and the bolt tis in a slot in S, so that the plates can be adjusted laterally. The cheek-p1ates T are at the end of the space between the crushingrollers and are exposed to wear. struction before described I am able to set up the plates as worn,to reverse their surfaces, and to introduce new wearing-plates, when parts.

The movable covers W to the rolls are usually of wood. The hopper V, into which the material is received and fed to the rollers,has inclines '0 at about forty -five degrees, and placed at opposite inclinations,so as to spread the ore with uniformity across the entire faces of the rollers.

The object of housing-plates S and wooden covers W are threefold: First, to prevent the ore from scattering asit is crushed; second, to confine the dust caused in crushing dry ores, so that a moderate suction with an eX- haust'fan will effectually collect the dust and convey it, with the air, to a dust-chamber or deliver it outside the building; third, to form by the housing-plates a good support for the adjustable cheek-pieces, and the hopper for feeding the ore to the rollers.

I am aware that a pair of rollers has been supported in pillow-blocks, one pair of pillow-blocks being stationary and the other movable, and that tie bolts have passed through openings in the pillow-blocks, and that fixed collars have been employed upon such tie-bolts. Said collars, however,did not By the conlimit the lateral movement given to the rollers by the springs, but only determined the place to which the moving pillow-block might be adjusted.

I claim as my invention 1. The combination, with the pair of crushing-rollers, of two movable pillow-blocks and two stationary pillow-blocks, tie-bolts passing through cylindrical openings in the pillowblocks, nuts upon the tie-bolts at one end to adjust the moving pillow blocks, springs, washers, and nuts at the other ends of the tiebolts, the springs bearing against the pillowblocks at one side, and fixed collars around the tie-bolts bearing against the other sides of such pillow-blocks, substantially as set forth, whereby the pressure of the springs can be adjusted without varying the position of the moving roller, and the moving roller can be adjusted without varying the tension of the springs, substantially as specified.

2. The combination, with the crushing-rollers and their shafts and pillow-blocks, of the housing-plates covering and inclosing the ends of the rollers below their shafts, and having depressions to receive the roller-shafts and elevated central portions, and the movable cheek-pieces applied inside of and adj ustably connected to the said housing-plates, substantially as specified.

3. The cheek pieces dovetailed at their edges, in combination with the stocks for the same, the housing-plates. and the attachingbolts, substantially as set forth. v

4. The combination, with the crushing-rollers, of the housing-plates bolted together, the movable cheek-pieces, the stocks'for the same, the attaching-bolts, and the covers for the rollers, substantially as set forth.

5. The combination, with the crushing-rollers, the housing-plates,and the cheek-pieces, of hopper-plates one above the other and inclined in opposite directions, and the frame by which they are supported on the housingplates, so that the material is spread evenly in passing to the rollers, substantially as set forth.

6. The combination, with the crushing-rollers and their shafts and pillow-blocks, of the housing-plates, and the movable covers to the rolls,for the purposes and substantially as set forth.

Signed by me this 31st day of July, A. D. 1884..

STEPHEN R. KROM.

Witnesses:

HAROLD SERRELL, WILLIAM G. Mo'rr. 

